3.154 \(\int \frac{x^3 (A+B x)}{(a+b x)^2} \, dx\)

Optimal. Leaf size=90 \[ \frac{a^3 (A b-a B)}{b^5 (a+b x)}+\frac{a^2 (3 A b-4 a B) \log (a+b x)}{b^5}-\frac{a x (2 A b-3 a B)}{b^4}+\frac{x^2 (A b-2 a B)}{2 b^3}+\frac{B x^3}{3 b^2} \]

[Out]

-((a*(2*A*b - 3*a*B)*x)/b^4) + ((A*b - 2*a*B)*x^2)/(2*b^3) + (B*x^3)/(3*b^2) + (
a^3*(A*b - a*B))/(b^5*(a + b*x)) + (a^2*(3*A*b - 4*a*B)*Log[a + b*x])/b^5

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Rubi [A]  time = 0.183133, antiderivative size = 90, normalized size of antiderivative = 1., number of steps used = 2, number of rules used = 1, integrand size = 16, \(\frac{\text{number of rules}}{\text{integrand size}}\) = 0.062 \[ \frac{a^3 (A b-a B)}{b^5 (a+b x)}+\frac{a^2 (3 A b-4 a B) \log (a+b x)}{b^5}-\frac{a x (2 A b-3 a B)}{b^4}+\frac{x^2 (A b-2 a B)}{2 b^3}+\frac{B x^3}{3 b^2} \]

Antiderivative was successfully verified.

[In]  Int[(x^3*(A + B*x))/(a + b*x)^2,x]

[Out]

-((a*(2*A*b - 3*a*B)*x)/b^4) + ((A*b - 2*a*B)*x^2)/(2*b^3) + (B*x^3)/(3*b^2) + (
a^3*(A*b - a*B))/(b^5*(a + b*x)) + (a^2*(3*A*b - 4*a*B)*Log[a + b*x])/b^5

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Rubi in Sympy [F]  time = 0., size = 0, normalized size = 0. \[ \frac{B x^{3}}{3 b^{2}} + \frac{a^{3} \left (A b - B a\right )}{b^{5} \left (a + b x\right )} + \frac{a^{2} \left (3 A b - 4 B a\right ) \log{\left (a + b x \right )}}{b^{5}} + \frac{\left (A b - 2 B a\right ) \int x\, dx}{b^{3}} - \frac{\left (2 A b - 3 B a\right ) \int a\, dx}{b^{4}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  rubi_integrate(x**3*(B*x+A)/(b*x+a)**2,x)

[Out]

B*x**3/(3*b**2) + a**3*(A*b - B*a)/(b**5*(a + b*x)) + a**2*(3*A*b - 4*B*a)*log(a
+ b*x)/b**5 + (A*b - 2*B*a)*Integral(x, x)/b**3 - (2*A*b - 3*B*a)*Integral(a, x
)/b**4

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Mathematica [A]  time = 0.0965533, size = 87, normalized size = 0.97 \[ \frac{\frac{6 a^3 (A b-a B)}{a+b x}+6 a^2 (3 A b-4 a B) \log (a+b x)+3 b^2 x^2 (A b-2 a B)+6 a b x (3 a B-2 A b)+2 b^3 B x^3}{6 b^5} \]

Antiderivative was successfully verified.

[In]  Integrate[(x^3*(A + B*x))/(a + b*x)^2,x]

[Out]

(6*a*b*(-2*A*b + 3*a*B)*x + 3*b^2*(A*b - 2*a*B)*x^2 + 2*b^3*B*x^3 + (6*a^3*(A*b
- a*B))/(a + b*x) + 6*a^2*(3*A*b - 4*a*B)*Log[a + b*x])/(6*b^5)

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Maple [A]  time = 0.013, size = 109, normalized size = 1.2 \[{\frac{B{x}^{3}}{3\,{b}^{2}}}+{\frac{A{x}^{2}}{2\,{b}^{2}}}-{\frac{B{x}^{2}a}{{b}^{3}}}-2\,{\frac{aAx}{{b}^{3}}}+3\,{\frac{{a}^{2}Bx}{{b}^{4}}}+3\,{\frac{{a}^{2}\ln \left ( bx+a \right ) A}{{b}^{4}}}-4\,{\frac{{a}^{3}\ln \left ( bx+a \right ) B}{{b}^{5}}}+{\frac{{a}^{3}A}{ \left ( bx+a \right ){b}^{4}}}-{\frac{B{a}^{4}}{ \left ( bx+a \right ){b}^{5}}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  int(x^3*(B*x+A)/(b*x+a)^2,x)

[Out]

1/3*B*x^3/b^2+1/2/b^2*A*x^2-1/b^3*B*x^2*a-2/b^3*a*A*x+3/b^4*a^2*B*x+3*a^2/b^4*ln
(b*x+a)*A-4*a^3/b^5*ln(b*x+a)*B+a^3/(b*x+a)/b^4*A-a^4/(b*x+a)/b^5*B

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Maxima [A]  time = 1.32483, size = 136, normalized size = 1.51 \[ -\frac{B a^{4} - A a^{3} b}{b^{6} x + a b^{5}} + \frac{2 \, B b^{2} x^{3} - 3 \,{\left (2 \, B a b - A b^{2}\right )} x^{2} + 6 \,{\left (3 \, B a^{2} - 2 \, A a b\right )} x}{6 \, b^{4}} - \frac{{\left (4 \, B a^{3} - 3 \, A a^{2} b\right )} \log \left (b x + a\right )}{b^{5}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate((B*x + A)*x^3/(b*x + a)^2,x, algorithm="maxima")

[Out]

-(B*a^4 - A*a^3*b)/(b^6*x + a*b^5) + 1/6*(2*B*b^2*x^3 - 3*(2*B*a*b - A*b^2)*x^2
+ 6*(3*B*a^2 - 2*A*a*b)*x)/b^4 - (4*B*a^3 - 3*A*a^2*b)*log(b*x + a)/b^5

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Fricas [A]  time = 0.201778, size = 189, normalized size = 2.1 \[ \frac{2 \, B b^{4} x^{4} - 6 \, B a^{4} + 6 \, A a^{3} b -{\left (4 \, B a b^{3} - 3 \, A b^{4}\right )} x^{3} + 3 \,{\left (4 \, B a^{2} b^{2} - 3 \, A a b^{3}\right )} x^{2} + 6 \,{\left (3 \, B a^{3} b - 2 \, A a^{2} b^{2}\right )} x - 6 \,{\left (4 \, B a^{4} - 3 \, A a^{3} b +{\left (4 \, B a^{3} b - 3 \, A a^{2} b^{2}\right )} x\right )} \log \left (b x + a\right )}{6 \,{\left (b^{6} x + a b^{5}\right )}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate((B*x + A)*x^3/(b*x + a)^2,x, algorithm="fricas")

[Out]

1/6*(2*B*b^4*x^4 - 6*B*a^4 + 6*A*a^3*b - (4*B*a*b^3 - 3*A*b^4)*x^3 + 3*(4*B*a^2*
b^2 - 3*A*a*b^3)*x^2 + 6*(3*B*a^3*b - 2*A*a^2*b^2)*x - 6*(4*B*a^4 - 3*A*a^3*b +
(4*B*a^3*b - 3*A*a^2*b^2)*x)*log(b*x + a))/(b^6*x + a*b^5)

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Sympy [A]  time = 3.58669, size = 90, normalized size = 1. \[ \frac{B x^{3}}{3 b^{2}} - \frac{a^{2} \left (- 3 A b + 4 B a\right ) \log{\left (a + b x \right )}}{b^{5}} - \frac{- A a^{3} b + B a^{4}}{a b^{5} + b^{6} x} - \frac{x^{2} \left (- A b + 2 B a\right )}{2 b^{3}} + \frac{x \left (- 2 A a b + 3 B a^{2}\right )}{b^{4}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate(x**3*(B*x+A)/(b*x+a)**2,x)

[Out]

B*x**3/(3*b**2) - a**2*(-3*A*b + 4*B*a)*log(a + b*x)/b**5 - (-A*a**3*b + B*a**4)
/(a*b**5 + b**6*x) - x**2*(-A*b + 2*B*a)/(2*b**3) + x*(-2*A*a*b + 3*B*a**2)/b**4

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GIAC/XCAS [A]  time = 0.332717, size = 194, normalized size = 2.16 \[ \frac{{\left (b x + a\right )}^{3}{\left (2 \, B - \frac{3 \,{\left (4 \, B a b - A b^{2}\right )}}{{\left (b x + a\right )} b} + \frac{18 \,{\left (2 \, B a^{2} b^{2} - A a b^{3}\right )}}{{\left (b x + a\right )}^{2} b^{2}}\right )}}{6 \, b^{5}} + \frac{{\left (4 \, B a^{3} - 3 \, A a^{2} b\right )}{\rm ln}\left (\frac{{\left | b x + a \right |}}{{\left (b x + a\right )}^{2}{\left | b \right |}}\right )}{b^{5}} - \frac{\frac{B a^{4} b^{3}}{b x + a} - \frac{A a^{3} b^{4}}{b x + a}}{b^{8}} \]

Verification of antiderivative is not currently implemented for this CAS.

[In]  integrate((B*x + A)*x^3/(b*x + a)^2,x, algorithm="giac")

[Out]

1/6*(b*x + a)^3*(2*B - 3*(4*B*a*b - A*b^2)/((b*x + a)*b) + 18*(2*B*a^2*b^2 - A*a
*b^3)/((b*x + a)^2*b^2))/b^5 + (4*B*a^3 - 3*A*a^2*b)*ln(abs(b*x + a)/((b*x + a)^
2*abs(b)))/b^5 - (B*a^4*b^3/(b*x + a) - A*a^3*b^4/(b*x + a))/b^8